The investigative reports show that terms such as "neck breaking" and "household weapons" were entered into the computer at the Orlando home of Caylee's grandparents where Caylee and her mother, Casey Anthony, also lived.
WKMG-TV, Orlando, said Wednesday the new documents released by the Florida State's Attorney's office also show that a Google search was made in March using the terms: "peroxide, acetone, alcohol and death."
Casey Anthony, 22, has been charged with murdering 3-year-old Caylee earlier this year. The child's body has not been found and her mother insists her babysitter kidnapped the child.
Police said they believe Casey Anthony used a computer to read up on chloroform, a chemical that is used to put people to sleep but can also be deadly in high enough concentrations.
WKMG said that while it was not known exactly who performed the searches, investigators noted they occurred during the hours when Casey's mother, Cindy Anthony, would normally be at work.